JPH08155749A - Gear cutting method - Google Patents
Gear cutting methodInfo
- Publication number
- JPH08155749A JPH08155749A JP29992394A JP29992394A JPH08155749A JP H08155749 A JPH08155749 A JP H08155749A JP 29992394 A JP29992394 A JP 29992394A JP 29992394 A JP29992394 A JP 29992394A JP H08155749 A JPH08155749 A JP H08155749A
- Authority
- JP
- Japan
- Prior art keywords
- gear
- heat treatment
- cutting method
- annular rack
- abrasive grain
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000005520 cutting process Methods 0.000 title claims abstract description 52
- 238000000034 method Methods 0.000 title claims abstract description 41
- 238000010438 heat treatment Methods 0.000 claims abstract description 22
- 239000006061 abrasive grain Substances 0.000 claims abstract description 21
- 239000000463 material Substances 0.000 claims description 31
- 238000007493 shaping process Methods 0.000 claims description 2
- 238000006073 displacement reaction Methods 0.000 abstract description 5
- 238000004070 electrodeposition Methods 0.000 abstract description 4
- 238000000137 annealing Methods 0.000 abstract 1
- 238000000227 grinding Methods 0.000 description 9
- 230000002093 peripheral effect Effects 0.000 description 8
- 238000005498 polishing Methods 0.000 description 6
- 238000003801 milling Methods 0.000 description 3
- 238000005496 tempering Methods 0.000 description 3
- 238000005255 carburizing Methods 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 229910052582 BN Inorganic materials 0.000 description 1
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
Landscapes
- Polishing Bodies And Polishing Tools (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、環状ラック形工具又は
総形工具による歯車の歯切方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gear cutting method using an annular rack type tool or a forming tool.
【０００２】[0002]
【従来の技術】従来の歯切方法として、環状フライスカ
ッターやホブ等のラック工具又は総形工具で歯車素材を
切削して歯溝を形成した後に、素材を焼入れ及び焼き戻
しといった熱処理をする技術が知られている。例えば、
モータ軸の先端に歯車を加工する場合、従来の歯切方法
は、図８に示すように、モータ軸を形成する棒状の歯車
素材１を切り出す材料出し工程８１と、歯車素材１の外
周面を旋削する旋削Ａ工程８２及び旋削Ｂ工程８３と、
歯切りに先立って外周面を研削する前外研工程８４と、
環状フライスカッターにより歯車２の歯溝２ａを切削す
る歯切り工程８５と、歯切部分のバリ取り工程８６と、
全体を浸炭焼入れ及び焼き戻しする熱処理工程８７と、
熱処理後に外周面を研削する後外研Ａ工程８８及び後外
研Ｂ工程８９と、ラップ加工及び洗浄を含む仕上工程９
０とから構成されていた。2. Description of the Related Art As a conventional gear cutting method, a gear material is cut with a rack tool such as an annular milling cutter or a hob or a forming tool to form a tooth groove, and then heat treatment such as quenching and tempering of the material is performed. It has been known. For example,
When machining a gear at the tip of a motor shaft, a conventional gear cutting method is, as shown in FIG. 8, a material feeding step 81 for cutting out a rod-shaped gear material 1 forming a motor shaft, and A turning A step 82 and a turning B step 83 for turning,
A prior external polishing step 84 for grinding the outer peripheral surface prior to gear cutting,
A gear cutting step 85 of cutting the tooth groove 2a of the gear 2 with an annular milling cutter, and a deburring step 86 of the gear cutting portion,
A heat treatment step 87 for carburizing and tempering the whole,
Post-external polishing A step 88 and post-external polishing B step 89 of grinding the outer peripheral surface after heat treatment, and finishing step 9 including lapping and cleaning.
It consisted of 0 and.
【０００３】また、この歯車２に噛合する傘歯車を加工
する場合、従来の歯切方法は、図９に示すように、歯車
素材３を円盤状に切り出す材料出し工程９１と、歯車素
材３を旋削して傘歯車４を形成する旋削Ａ工程９２及び
旋削Ｂ工程９３と、環状フライスカッターにより傘歯車
４に歯溝４ａを切削する歯切り工程９４と、歯切部分の
バリ取り工程９５と、浸炭焼入れ及び焼き戻しを含む熱
処理工程９６と、熱処理後のレース工程９７と、ラップ
加工及び洗浄を含む仕上工程９８とから構成されてい
た。In the case of processing a bevel gear that meshes with the gear 2, the conventional gear cutting method is, as shown in FIG. 9, a material feeding step 91 for cutting the gear material 3 into a disk shape and a gear material 3. A turning A step 92 and a turning B step 93 for turning to form the bevel gear 4, a gear cutting step 94 for cutting the tooth groove 4a in the bevel gear 4 with an annular milling cutter, and a deburring step 95 for a gear cutting portion, It was composed of a heat treatment step 96 including carburizing and tempering, a race step 97 after the heat treatment, and a finishing step 98 including lapping and cleaning.
【０００４】[0004]
【発明が解決しようとする課題】ところが、従来の歯切
方法によると、熱処理工程８７，９６に先立って歯切り
工程８５，９４を実施するので、歯切りに伴ってバリが
発生しやすく、これを除去するためのバリ取り工程８
６，９５が必要であった。また、歯切り後に熱処理する
と、熱変位によって各部の寸法が変動することがあり
（特に大型歯車の場合に顕著）、これを修正するため
に、熱処理後に後外研工程８８，８９やレース工程９７
が必要になり、総じて、工程数が増えるという問題点が
あった。However, according to the conventional gear cutting method, since the gear cutting steps 85 and 94 are performed prior to the heat treatment steps 87 and 96, burrs are apt to be generated due to the gear cutting. Deburring process 8 for removing
6,95 was needed. Further, if heat treatment is performed after gear cutting, the dimensions of each part may change due to thermal displacement (particularly in the case of large gears), and in order to correct this, the post-external polishing steps 88 and 89 and the race step 97 are performed after heat treatment.
However, there is a problem in that the number of steps increases as a whole.
【０００５】そこで、本発明の課題は、歯車を少ない工
程数で精度よく加工できる新規な歯切方法を提供するこ
とにある。Therefore, an object of the present invention is to provide a novel gear cutting method capable of accurately processing a gear with a small number of steps.
【０００６】[0006]
【課題を解決するための手段】上記の課題を解決するた
めに、本発明の歯切方法は、刃先にＣＢＮ砥粒（立方窒
化ホウ素）層を備えた環状ラック形工具又は総形工具を
用い、熱処理後の歯車素材を研削して歯溝を形成するこ
とを特徴とする。In order to solve the above-mentioned problems, the gear cutting method of the present invention uses an annular rack type tool or a forming tool having a CBN abrasive grain (cubic boron nitride) layer on the cutting edge. The gear material after the heat treatment is ground to form a tooth groove.
【０００７】[0007]
【作用】本発明の歯切方法によれば、環状ラック形工具
及び総形工具の刃先にＣＢＮ砥粒層が設けられているの
で、熱処理により焼入れされた歯車素材をシャープに研
削でき、歯溝にバリが発生しにくくなり、その後のバリ
取り工程が不要になる。また、熱処理後に歯切りを行う
ので、熱変位による歯車の寸法変化を歯切り工程で同時
に修正でき、歯切後の工程を簡略化することができる。According to the gear cutting method of the present invention, since the CBN abrasive grain layer is provided at the cutting edges of the annular rack-shaped tool and the all-shaped tool, the gear material hardened by the heat treatment can be sharply ground, and the tooth groove Burr is less likely to occur, and the subsequent deburring process is unnecessary. Further, since gear cutting is performed after the heat treatment, the dimensional change of the gear due to thermal displacement can be simultaneously corrected in the gear cutting process, and the process after gear cutting can be simplified.
【０００８】[0008]
【実施例】以下、本発明を具体化した実施例を図面に基
づいて説明する。図１は環状ラック形工具の一実施例を
示すもので、環状ラック形工具６のボデー６ａは筒状に
成形されている。ボデー６ａの先端には刃先６ｂが歯車
２の歯溝２ａと相似する形状で形成され、その内周面及
び外周面にはＣＢＮ砥粒層７が設けられている。ＣＢＮ
砥粒層７は、例えば、粒度＃２７０のＣＢＮ砥粒を、刃
先６ｂに電着させ、層厚０．０８５ｍｍ程度に形成され
ている。一般的なＣＢＮ砥石では、砥粒占有面積が５０
〜６０％であるが、本発明では砥粒占有面積を３５〜４
５％（粒度＃２７０の場合、電着密度は１mm2 あたり１
０〜１４個）と低く設定してあって、比較的低密度で優
れた切れ味が得られ、一般的なＣＢＮ砥石と比較して砥
粒数を４０〜５０％に削減することもできる。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an embodiment of an annular rack-shaped tool, and a body 6a of the annular rack-shaped tool 6 is formed in a tubular shape. A cutting edge 6b is formed at the tip of the body 6a in a shape similar to the tooth groove 2a of the gear 2, and a CBN abrasive grain layer 7 is provided on the inner peripheral surface and the outer peripheral surface thereof. CBN
The abrasive grain layer 7 is formed to have a layer thickness of about 0.085 mm by, for example, electrodepositing CBN abrasive grains having a grain size of # 270 on the cutting edge 6b. With a general CBN grindstone, the area occupied by the abrasive grains is 50
However, in the present invention, the abrasive grain occupying area is 35 to 4%.
5% (for grain size # 270, the electrodeposition density is 1 per 1 mm 2
The number of abrasive grains can be reduced to 40 to 50% as compared with a general CBN grindstone.
【０００９】図２は歯切方法の第一実施例を示すもの
で、ここでは前記環状ラック形工具６を用いてモータ軸
の先端に歯車が加工される。まず、材料出し工程１１に
おいて、モータ軸を形成する歯車素材１が棒状に切り出
される。歯車素材１の材質は、ＳＣＭ４３５又はＳＣＭ
４４０である。次いで、旋削Ａ工程１２及び旋削Ｂ工程
１３において、歯車素材１の外周面が旋削され、次に、
熱処理工程１４で、素材１の全体が焼入れ及び焼き戻し
される。この場合の硬度はＨＲＣ５３である。FIG. 2 shows a first embodiment of the gear cutting method, in which a gear is machined at the tip of the motor shaft by using the annular rack type tool 6. First, in the material feeding step 11, the gear material 1 forming the motor shaft is cut into a rod shape. The material of the gear material 1 is SCM435 or SCM
It is 440. Next, in the turning A step 12 and the turning B step 13, the outer peripheral surface of the gear material 1 is turned, and then
In the heat treatment step 14, the entire material 1 is quenched and tempered. The hardness in this case is HRC53.
【００１０】熱処理後には、外研Ａ工程１５及び外研Ｂ
工程１６において、歯車素材１の外周面が研削される。
続いて、ＣＢＮ歯研工程１７で、環状ラック形工具６に
より歯車素材１の先端部が研削され、歯車２に歯溝２ａ
がスパイラル状に形成される。この場合、環状ラック形
工具６の刃先６ｂにＣＢＮ砥粒層７が設けられているの
で、歯車素材１がシャープに研削され、歯溝２ａのバリ
が抑制されるとともに、熱変位による歯車２の寸法変化
が同時に修正される。その後、仕上工程１８で、歯車２
がバフ研磨及び洗浄され、モータ軸の製品が完成する。
従って、この実施例の歯切方法によれば、歯切り後のバ
リ取り工程及び寸法修正工程を省略でき、少ない工程数
で歯車２を精度よく加工することができる。After the heat treatment, external polishing A step 15 and external polishing B
In step 16, the outer peripheral surface of the gear material 1 is ground.
Then, in the CBN tooth grinding step 17, the tip end of the gear material 1 is ground by the annular rack-shaped tool 6, and the gear 2 has a tooth groove 2a.
Are formed in a spiral shape. In this case, since the CBN abrasive grain layer 7 is provided on the cutting edge 6b of the annular rack-shaped tool 6, the gear material 1 is sharply ground, the burr of the tooth groove 2a is suppressed, and the gear 2 due to thermal displacement is The dimensional changes are corrected at the same time. Then, in the finishing step 18, the gear 2
Is buffed and cleaned to complete the motor shaft product.
Therefore, according to the gear cutting method of this embodiment, the deburring step and the dimension correcting step after the gear cutting can be omitted, and the gear 2 can be accurately processed with a small number of steps.
【００１１】図３は歯切方法の第二実施例を示すもの
で、ここでは、熱処理後に高速研削工程２５が設けられ
ている。高速研削工程２５では、好ましくはＣＢＮ砥石
が用いられ、該砥石によって歯車素材１の外周面が高速
で研削される。その他の工程は第一実施例と同じであっ
て、同様の作用効果が得られる。FIG. 3 shows a second embodiment of the gear cutting method, in which a high speed grinding step 25 is provided after the heat treatment. In the high speed grinding step 25, a CBN grindstone is preferably used, and the outer peripheral surface of the gear material 1 is ground at high speed by the grindstone. Other steps are the same as those in the first embodiment, and similar effects can be obtained.
【００１２】図４は歯切方法の第三実施例を示すもの
で、ここでは、センタリング工程３２において、歯車素
材１の両端面にセンタ孔１ａが形成される。センタリン
グ後には熱処理工程３３が実施され、旋削に先立って歯
車素材１が熱処理される。熱処理後の歯車素材１は、旋
削工程３４で心押台を用いて１チャックキングで旋削さ
れた後、高速研削工程３５を経て、ＣＢＮ歯研工程３６
で環状ラック形工具６によって歯溝２ａが研削される。FIG. 4 shows a third embodiment of the gear cutting method. Here, in the centering step 32, center holes 1a are formed in both end faces of the gear material 1. After the centering, the heat treatment step 33 is performed, and the gear material 1 is heat treated prior to turning. The gear material 1 after the heat treatment is turned by one chucking using a tailstock in a turning step 34, and then subjected to a high-speed grinding step 35 and a CBN tooth grinding step 36.
Then, the tooth groove 2a is ground by the annular rack-shaped tool 6.
【００１３】図５は歯切方法の第四実施例を示すもの
で、ここでは、熱処理後の旋削がＡ工程４４及びＢ工程
４５に分けて実施されるとともに、外周研削工程が省略
されている。その他の工程は第三実施例と同様である。FIG. 5 shows a fourth embodiment of the gear cutting method. In this embodiment, the turning after heat treatment is divided into A step 44 and B step 45, and the outer peripheral grinding step is omitted. . The other steps are the same as in the third embodiment.
【００１４】図６は歯切方法の第五実施例を示すもの
で、ここでは歯車２に噛合する傘歯車４が同じ環状ラッ
ク形工具６を用いて加工される。まず、材料出し工程５
１において、歯車素材３が円盤状に切り出される。歯車
素材３の材質及び硬度は歯車２の場合と同等である。次
いで、熱処理工程５２で、素材３が焼入れ及び焼き戻し
される。次に、旋削Ａ工程５３及び旋削Ｂ工程５４にお
いて、歯車素材３が旋削されて傘歯車４が賦形される。
続いて、ＣＢＮ歯研工程５５で、環状ラック形工具６の
ＣＢＮ砥粒層７によって歯溝４ａがシャープに研削さ
れ、同時に、熱変位による傘歯車４の寸法変化が修正さ
れる。従って、その後のバリ取り工程及び寸法修正工程
を省略でき、歯切り後直ちに仕上工程５６を実施でき、
もって、少ない工程数で傘歯車４を精度よく加工するこ
とができる。FIG. 6 shows a fifth embodiment of the gear cutting method, in which the bevel gear 4 meshing with the gear 2 is machined by using the same annular rack type tool 6. First, the material feeding step 5
1, the gear material 3 is cut out into a disc shape. The material and hardness of the gear material 3 are the same as those of the gear 2. Next, in a heat treatment step 52, the material 3 is quenched and tempered. Next, in the turning A process 53 and the turning B process 54, the gear material 3 is turned and the bevel gear 4 is shaped.
Then, in the CBN grinding step 55, the tooth groove 4a is sharply ground by the CBN abrasive grain layer 7 of the annular rack-shaped tool 6, and at the same time, the dimensional change of the bevel gear 4 due to thermal displacement is corrected. Therefore, the subsequent deburring step and dimension correction step can be omitted, and the finishing step 56 can be performed immediately after gear cutting,
Therefore, the bevel gear 4 can be accurately processed with a small number of steps.
【００１５】図７は総形工具の一実施例を示すもので、
総形工具８のボデー８ａはホイール状に成形されてい
る。ボデー８ａの外周には刃先８ｂが歯車５の歯溝５ａ
と相似するインボリュート形状で形成され、その研削面
にはＣＢＮ砥粒層９が設けられている。ＣＢＮ砥粒層９
は、例えば、粒度＃３２５のＣＢＮ砥粒を電着により刃
先８ｂに付着させて、層厚０．０７５ｍｍ程度で形成さ
れている。本実施例では、砥粒の電着密度は１mm2 あた
り１２〜２０個で、図１の環状ラック形工具６と同様に
低密度で優れた切れ味が得られる。FIG. 7 shows an embodiment of the forming tool.
The body 8a of the shaping tool 8 is formed into a wheel shape. On the outer periphery of the body 8a, the cutting edge 8b is the tooth groove 5a of the gear 5.
It is formed in an involute shape similar to, and a CBN abrasive grain layer 9 is provided on the ground surface thereof. CBN abrasive grain layer 9
Is formed to have a layer thickness of about 0.075 mm by, for example, adhering CBN abrasive grains having a grain size of # 325 to the cutting edge 8b by electrodeposition. In this embodiment, the electrodeposition density of the abrasive grains is 12 to 20 per 1 mm 2, and similar to the annular rack tool 6 of FIG. 1, low density and excellent sharpness can be obtained.
【００１６】なお、本発明は上記実施例のモータ軸上歯
車２及び傘歯車４の歯切方法のみに限定されるものでは
なく、例えば、平歯車、はすば歯車、やまば歯車、ハイ
ポイドギヤ、ウォームギヤ、ねじ歯車等の各種歯車の歯
切方法に適用して具体化することも可能である。The present invention is not limited to the gear cutting method for the motor shaft upper gear 2 and the bevel gear 4 according to the above-described embodiment. For example, spur gears, helical gears, helical gears, hypoid gears, It is also possible to apply the invention to a gear cutting method for various gears such as a worm gear and a screw gear and embody it.
【００１７】[0017]
【発明の効果】以上詳述したように、本発明によれば、
ＣＢＮ砥粒層を備えた環状ラック形工具又は総形工具で
熱処理後の歯車素材を研削するので、歯車を少ない工程
数で精度よく加工できるという優れた効果を奏する。As described in detail above, according to the present invention,
Since the gear material after the heat treatment is ground with the annular rack type tool or the all-purpose tool having the CBN abrasive grain layer, the gear wheel can be machined accurately with a small number of steps.
【図１】本発明の歯切方法で用いられる環状ラック形工
具の断面図である。FIG. 1 is a sectional view of an annular rack-shaped tool used in a gear cutting method of the present invention.
【図２】歯切方法の第一実施例を示す工程図である。FIG. 2 is a process drawing showing a first embodiment of a gear cutting method.
【図３】歯切方法の第二実施例を示す工程図である。FIG. 3 is a process drawing showing a second embodiment of the gear cutting method.
【図４】歯切方法の第三実施例を示す工程図である。FIG. 4 is a process drawing showing a third embodiment of the gear cutting method.
【図５】歯切方法の第四実施例を示す工程図である。FIG. 5 is a process drawing showing a fourth embodiment of the gear cutting method.
【図６】歯切方法の第五実施例を示す工程図である。FIG. 6 is a process drawing showing a fifth embodiment of the gear cutting method.
【図７】総形工具の実施例を示す断面図である。FIG. 7 is a sectional view showing an embodiment of a forming tool.
【図８】歯切方法の第一従来例を示す工程図である。FIG. 8 is a process drawing showing a first conventional example of a gear cutting method.
【図９】歯切方法の第二従来例を示す工程図である。FIG. 9 is a process drawing showing a second conventional example of a gear cutting method.
１，３・・歯車素材、２，４，５・・歯車、２ａ，４
ａ，５ａ・・歯溝、６・・環状ラック形工具、７・・Ｃ
ＢＮ砥粒層、８・・総形工具、６ｂ，８ｂ・・刃先、
７，９・・ＣＢＮ砥粒層。1,3 ... Gear material, 2,4,5, ... Gear, 2a, 4
a, 5a ... Tooth groove, 6 ... Annular rack type tool, 7 ... C
BN abrasive grain layer, 8 ... Forming tool, 6b, 8b ...
CBN abrasive grain layer.
Claims (1)
形工具又は総形工具を用い、熱処理後の歯車素材を研削
して歯溝を形成することを特徴とする歯切方法。1. A gear cutting method, characterized in that an annular rack-shaped tool having a CBN abrasive grain layer at a cutting edge or a shaping tool is used to grind a gear material after heat treatment to form a tooth groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29992394A JPH08155749A (en) | 1994-12-02 | 1994-12-02 | Gear cutting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29992394A JPH08155749A (en) | 1994-12-02 | 1994-12-02 | Gear cutting method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08155749A true JPH08155749A (en) | 1996-06-18 |
Family
ID=17878566
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29992394A Pending JPH08155749A (en) | 1994-12-02 | 1994-12-02 | Gear cutting method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08155749A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001298901A (en) * | 2000-04-10 | 2001-10-26 | Mitsubishi Electric Corp | Geared motor |
| CN102554808A (en) * | 2012-03-12 | 2012-07-11 | 无锡市启龙机床有限公司 | Grinding wheel used for grinding valve lock clamp groove |
| JP6127220B1 (en) * | 2015-12-10 | 2017-05-10 | 株式会社アライドマテリアル | Super abrasive wheel |
| WO2017098764A1 (en) * | 2015-12-10 | 2017-06-15 | 株式会社アライドマテリアル | Super-abrasive grinding wheel |
| CN107097156A (en) * | 2017-06-26 | 2017-08-29 | 汉德车桥(株洲)齿轮有限公司 | A kind of electroplating CBN emery wheel for spiral bevel gear roll flute |
| CN107350727A (en) * | 2016-05-09 | 2017-11-17 | 南京晨伟机械设备制造有限公司 | A kind of processing technology of high intensity plunger pump pipe clamp |
| CN108146420A (en) * | 2017-12-29 | 2018-06-12 | 合肥久享机械有限责任公司 | A kind of high-precision A BS sensors fixing bracket and process |
-
1994
- 1994-12-02 JP JP29992394A patent/JPH08155749A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001298901A (en) * | 2000-04-10 | 2001-10-26 | Mitsubishi Electric Corp | Geared motor |
| CN102554808A (en) * | 2012-03-12 | 2012-07-11 | 无锡市启龙机床有限公司 | Grinding wheel used for grinding valve lock clamp groove |
| JP6127220B1 (en) * | 2015-12-10 | 2017-05-10 | 株式会社アライドマテリアル | Super abrasive wheel |
| WO2017098764A1 (en) * | 2015-12-10 | 2017-06-15 | 株式会社アライドマテリアル | Super-abrasive grinding wheel |
| CN107405755A (en) * | 2015-12-10 | 2017-11-28 | 联合材料公司 | Super-abrasive grinding wheel |
| US10307888B2 (en) | 2015-12-10 | 2019-06-04 | A.L.M.T. Corp. | Superabrasive wheel |
| CN107350727A (en) * | 2016-05-09 | 2017-11-17 | 南京晨伟机械设备制造有限公司 | A kind of processing technology of high intensity plunger pump pipe clamp |
| CN107097156A (en) * | 2017-06-26 | 2017-08-29 | 汉德车桥(株洲)齿轮有限公司 | A kind of electroplating CBN emery wheel for spiral bevel gear roll flute |
| CN108146420A (en) * | 2017-12-29 | 2018-06-12 | 合肥久享机械有限责任公司 | A kind of high-precision A BS sensors fixing bracket and process |
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